diff --git a/ccd_defs.json b/ccd_defs.json
index 86df606c..666676f2 100644
--- a/ccd_defs.json
+++ b/ccd_defs.json
@@ -176,6 +176,7 @@
   "NIKON CORPORATION NIKON D70": 23.7,
   "NIKON CORPORATION NIKON D70s": 23.7,
   "NIKON CORPORATION NIKON D80": 23.6,
+  "NIKON CORPORATION NIKON D5300": 23.5,
   "NIKON D5100": 23.6,
   "NIKON E2500": 5.27,
   "NIKON E3100": 5.27,